ZFS root mount problem

[Patrick Gibson]

I'm installing 8.2 on a server using the instructions for ZFS root
filesystem (http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot), and when I
reboot after installing, it says:

Root mount waiting for: usbus4

followed by:

ROOT MOUNT ERROR

When I did the initial install, I booted using a CD, and then from the
8.2 livefs on a USB stick. I'm not sure where it's getting usbus4 from
when it boots from the hard disk.

I can't figure out where to reset this. Any pointers?

Patrick